Beubef beooks and william ijt



(No Model.)

R. BROOKS & W. N. LE PAGE.

EVAPORATING APPARATUS.

Patented July-5 1881.

" INVENTORS ATTORNEY PhoXu-Limngrapher. wmimm n. c,

UNITED f STATES PATENT ()FFICE.

REUBEN BROOKS AND WILLIAM N. LE PAGE, OF ROOKPORT, MASS.

EVAPO RATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 243,686, dated July 5,1881.

Application filed April 9, 1881. (No model.)

To all whom it may concern:

Be'it known that we, R UBEN BROOKS and WILLIAM N. LE PAGE, of Rockport,in the county of Essex and State of Massachusetts, have invented certainnew and useful Improvements in Evaporating Apparatus; and we do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itpertains to make and use it, reference being had to the accompanyingdrawings, which form part of this specification.

Our invention relates to an improvement in apparatus for evaporatingglue, the object being to provide means whereby a great portion of thewater element in glue solutions may be eliminated therefrom withrapidity and with the application of heat for the shortest possibleperiod, thereby avoiding the deteriorating effects upon the glue of thelong-continued application of heat.

With this object in View our invention consists in certain details ofconstruction and combinations of parts, as will be hereinafterdescribed, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view, in plan view, of ourevaporating apparatus. Fig. 2 is a view in side elevation thereof. Fig.3 is a view in section, showing the feeding-tubes. Fig. 4 is a view, inlongitudi nal vertical section, of a modification of our apparatus.Fig.5 is a view in vertical crosssection thereof. Fig. 6 is a view,inlongitudi nal cross-section, of a second modification and. Fig. 7 is aview in vertical cross-section thereof.

'A represents a helix of hollow copper tub-' ing, mounted upon a reel,consisting of radial arms B, supporting longitudinal arms 0. The radialarms B are attached to and radiateirom a steam-pipe, D, traversing thelongitudinal axis of the helix, and have the arms 0, which support thehelix, secured to their outer extremities. The ends of the helix areattached" to the steam-supply pipe D in such manner as to establish opensteam-communication between them.

Inorder to prevent the steam from passing directly through the pipe Dand to fulfill the purposes of the invention, it is necessary to dividethe pipe D into two sectionsat a point between the points where the endsof the helix are connected to it. Thedivision of the pipe is practicallyaccomplished by a'plug, as at E,

from which it will be discharged into the pipe in the form of wastesteam and water in the opposite section thereof.

Inasmuch as'in traversing the whole length of the helix the steam willbecome partially condensed, it is necessary to supply live steam to thehelix by arms F, which connect the pipe D with the helix A at differentpoints thereof. In order, therefore, that the feeders F may be suppliedwith steam to conduct it to the helix at different points of its length,it will be found necessary to plug the pipe D at a point near thepoint-at which the discharging end of the helix is connected thereto.This will be obvious by reference to the drawings. Steam is furnished tothe pipe D from any convenient source through pipe G, provided with apacked joint,'H.

The'helix A, steam-pipe D, reel, and all subordinate accessories aremounted in a frame adapted to be vertically reciprocated over a tank, I,containing a glue solution, which it is desired to reduce by theelimination of a portion of the water which it contains.

The frame aboveadverted to consists of horizontal beams J and verticalbeams K. The outer ends of the beams J are pivoted at points exterior tothe tankin such manner as to allow them a reciprocating verticalmovement. The forward ends of the said beams J extend over the tank I,containing the glue solution, and are provided'with bearings vL, inwhich the ends of the steam-pipe D are journaled, which latter hasrotary movement imparted to it through a pulley, M, mounted on one endof the helix A is immersed in the solution in the tank I.

Having set forth the construction of our evaporating apparatus, we willnow proceed to briefly describe its method of operation.

Steam is admitted to pass through and heat the helix A, which isactuated in rotary motion with the pipe D, constituting its axis, bymotion transmitted to pulley M through belt N from pulley O. The framesupporting the apparatus is now lowered through devices before explaineduntil the periphery of the helix is immersed the required distance inthe solution in the tank. As the helix revolves portions of the fluidsolution will adhere to it and be separated from and elevated above thesurface of fluid in the tank, to which it will be returned in acondensed state, falling thereinto in the shape of minute drops.Although the period of contact between the elevated portion of fluid andthe helix is of but short duration, it is still sufficiently long topermit the heated tube to expel a great portion of the water in thefluid before it is returned to the mass in the tank. In falling backinto the tank the liquid, being divided into minute drops, is cooled,and also further condensed and evaporated by exposure to the air. Therotary motion of the coil will establish a series of currents in thetank, which will operate to present every portion of the liquid to thehelix. The revolving helix will, as thus explained,'continually raiseand heat new portions of the solution and expel the water therefrom inclouds of steam, while the partially-condensed drops of solution willconstantly fall from the helixcoil into the tank in a shower of minutedrops. As the expulsion of water from the fluid reduces it in bulk it isnecessary during the-evaporatin g operation to frequently lower theframe and helix by means of the adjustable chains before described, inorder to keep the periphery of the helix immersed to the same depth inthe liquid.

The result of the hereinabove-described method of applying heat to thesurface of and momentarily heating a solution of glue is the rapidevaporation thereof with out the danger of overheating attendant uponthe old methods.

It is well known that the long-continued application of a low degree ofheat or the application of a high degree of heat for a short periodseriously impairs the adhesive qualities of glue or gelatine. The valueof the latter for dietetic purposes is also affected.

Our invention contemplates only the momentary application of heat to thesurface of the glue or gelatine, and is free from the objections abovealluded to.

We have described and briefly outlined the manner of operation of thepreferable form of apparatus necessary to carry out our invention; butit is apparent that such apparatus may assume different forms withouttranscending the scope of our invention.

Figs. 3, 4, 5, and 6, respectively, represent viewsinverticallongitudinal andverticalcrosssections of modified forms of apparatus.

In the modifications shown in Figs. 3 and 4, instead of disposing theheating tubes in a helix, A, coiled on a reel, they are arranged insections parallel with the central pipe, S, and have steam-communicationtherewith through radial arms A, which radiate from said pipe S like thespokes of a wheel. Each tube-see tion B is supported at each end by anarm, A, as shown in the drawings. 0 represents a plug located at asuitable point within the pipe D to force the steam to takea prescribedcourse through the radial arms A and tube-sections B. The otheraccessories of this form of evaporator are substantially the same asthose employed by the apparatus first described.

Figs. 5 and 6 represent still another form which our apparatus mayassume and still fall within the scope of our invention. Herein paralleltubes A connect in open steam-communication two annular chambers, eachof which is formed by joining perforated segmental sections B which donot communicate with each other. Each section B of the chambers isconnected by a pipe, 0 with a steam-supply pipe, D divided into as manycompartments "as there are chamber-sections. The necessity of suchconstruction will be apparent, as each section of the chamber whichcommunicates with a'similar section of the other chamber by a number ofhollow tubes A must have independent entrance and exit for live steam,waste steam, ahd water. In this latter construction the steam-supplypipe D is not continuous, but is simply secured to the outer face ofeach of the annular chambers, which are held in proper position by asolid shaft, E, interposed between their inner faces.

While it is apparent that our apparatus is adapted to the evaporation ofall liquids, it is, as stated, chiefly intended to be used in theevaporation of glue and gelatinous solutions. To the latter use it hasbeen found peculiarly adapted.

We would further have it understood that we do not limit ourselves tothe exact constructions shown and described, but hold ourselves atliberty to make such slight alterations and variations in details ofconstruction and combinations of parts as by fair in tendment do nottranscend the spirit ot'our invention.

Having fully described our invention, what we claim as new, and desireto secure by Let ters Patent, is

1. An evaporating apparatus consisting of a series of tubes disposed incylindrical form,

adapted to have steam passed through them,

arranged to be raised and lowered over a tank containing the solution toimmerse the tubes IIO devices adapted to actuate the steampipe and helixin rotary motion, substantially as set forth.

3. Au evaporating apparatus consisting, essentially, of a helix, eachend of which communicates with a steam-pipe axially traversing it, saidpipe being plugged between the points of helix communication to forcethe steam through the latter, feeding-arms radiating from the steam-pipeand connecting with and conducting steam to different portions of thehelix, and a frame adapted to be vertically adjusted, upon which saidsteam-pipeis journaled to have rotary movement, substantially as setforth.

4. An evaporating apparatus consisting, essentially, of a helix wound ona reel mounted on a steam-pipe, which latter axially traverses the helixand with which its ends communicate, said pipe being plugged between thepoints of helix communication to force the steam to take a prescribedpath through the helix, steam-connection with one end of the steam-pipe,a pulley fixed to said pipe and connectin g with motive power, and aframe, adapted to be vertically adjusted, upon which said 25 pipe andaccessories are journaled, substantially as set forth.

5. An evaporating apparatus consisting of a helix adapted to have steampassed through it, to be journaled upon a frame arranged to 0 havevertical adjustment, and to be actuated in rotary movement with itsperiphery immersed in the solution to be evaporated, substantially asset forth.

In testimony that we claim the foregoing we 3 5 have hereunto set ourhands this 24th day of March, 1881.

REUBEN BROOKS. WILLIAM N. LE PAGE.

Witnesses LEVI OLEAVTES, ALFRED PARSONS.

